Geometrical instruments – Miscellaneous – Light direction
Patent
1998-01-05
1999-11-16
Gibson, Randy W.
Geometrical instruments
Miscellaneous
Light direction
33424, 33431, 33457, 33471, B43L 500, B43L 710, A47B 2700
Patent
active
059835095
DESCRIPTION:
BRIEF SUMMARY
Marine navigation device by means of data supplied by a G.P.S. that allows one to position on a chart, to orient and to trace easily one's route.
The invention refers to a marine navigation device by means of data supplied by a G.P.S. which allows the positioning on a chart, the orientation and the tracement of one's route with the greatest of ease.
Numerous means have been used in maritime navigation to locate and trace one's route, these means concerned essentially the sextant, the compass rose and the compass.
The development of communications via satellites allows nowadays the transmission of the data in real time and the expansion of the "Global positioning system ", more commonly designated G.P.S., enabling to supply exact indications of latitude and longitude in relation to an exact point of emission in aerial, maritime or land navigation.
In maritime navigation it is interesting to use the data of the G.P.S. and to finalize a simple and effective device which allows one to transpose rapidly the indications of the latitude and longitude supplied by the G.P.S. on a chart.
Certain known means have attempted to use the data of the G.P.S., but to date the used devices have not allowed the rapid and exact positioning on a navigational chart. On the contrary, it seems that the known means lead the navigator to use meridians and parallels in an approximate way.
Furthermore, some of these means do not consider the surface of the chart tables, namely of those used by pleasure boats which allow the installation of positioning means and simple and effective reading means.
PRIOR ART & STATE OF THE ART
Apart from the traditional means described above, the patent DE.U.9213 021 (SCHUZ & AL) describes a navigation ruler made in two parts. This ruler can only pivot but does not allow any sliding motion, which presents many drawbacks tied to utilisation and precision. This means allows to transpose the data of the G.P.S. but the ruler must be displaced as a whole on the navigational chart, which is disposed on the table provided FOR that purpose. The displacement on the chart is not always easy, but above all this one involves a loss of precision.
Another document GB A.229 815 (COWWAN THOMAS ALEXANDER) also concerns a reading means from data supplied by a G. P. S.
Although it is interesting, this means allows a reading according to the bearing and of the distance and requires a programmation of the G.P.S. on the centre of the compass rose to be used, which is not suitable for pleasure navigation where reading must be quick, simple and safe.
Other documents such as the U.S. Pat. No. 4 969 271 (SUMA Mallory L) refer to means based on the << universal and transverse Mercator's projection of the earth>> but these means often describe specific applications, such as military, and do not refer in any way to pleasure navigation. This document describes a device in order to position on a chart including two superimposed discs, one serving as protractor, the other as reader. These discs are connected in their rotation centre by bearing means. It also includes two positioning and orientation rulers 16,18. This device allows, however, the location of the user by two other known points which can visually be identified on the ground, by the location of the user. This device is intended to be used on land and not on sea.
Despite these interesting inventive steps, the known means do not allow to transpose with rapidity and precision the data supplied by a G.P.S.
It became necessary to remedy the drawbacks of the known means and to obtain an effective, simple and safe navigation ruler.
This invention proposes to reach these objectives and refers to a device of simple conception and utilisation, allowing very rapidly the positioning and the tracing of one's route with the greatest of ease.
DESCRIPTION OF THE INVENTION
The device is composed of two revolving discs one on top of the other and of two sliding rulers for positioning and for fast reading, the whole maintained by a central bearing eyelet. Each disc is provi
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Gosselin Francis
Leloup Frederic
Gibson Randy W.
Kasper Horst M.
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